fate/fortune teller
use statistic to make a fortune teller.
learn by asking some questions, and use those data to do statistic analysis.
find something related.
and next time, when user answer some of your questions, you can tell then you know something they didn't answer yet.
http://www.fatehouse.com/
http://140.114.56.47/zhi3wei2/zhi3wei2.html
http://destiny.xfiles.to/webtools/Purple.jsp
http://astro.tom.com/fate/list01.html
排盤algo
http://www.winddust.com/micr1/micr_line1.htm
http://www.math.ncu.edu.tw/~weihan/ziwei/wziwei.cgi